# str = "day day up"
# for i in range(len(str)):
#     print(str[i],end=" ")

# list1 = []
# list1[0] = 1
# list1[1] = 2
# list1.append(3)
# list1.append(4)
# list1.append(5)
# print(list1)


# list3 = (1,2,3)
# list3 = list()
# list3.append(1)
# list3.append(2)
# list3.append(3)
# print(list3)

list2 = [1,2,3]
for i in list2:
    print(i)
list2.insert(1,10)
print(list2)
list2.extend([11,12])
print(list2)
list2.sort(reverse=True) #默认升序
print("--------------")
print(list2)

list3 = sorted(list2)
print(list2)
print(list3)
# del list3
# print("+++++++++++++++")
# print(list3)#'list3' is not defined

list4 = [1,3,5,7,9]

#1_10
list5 = [i**2 for i in range(1,10) if i%2 !=0]
print(list5)

str = ('1111',)
print(type(str))

# list4 = range(1,3)
# print(list4)

